From: NeilBrown <neilb@suse.com>
To: Jeff Layton <jlayton@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
Martin Wilck <mwilck@suse.de>,
linux-fsdevel@vger.kernel.org,
Frank Filz <ffilzlnx@mindspring.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 4/5] fs/locks: change all *_conflict() functions to return bool.
Date: Tue, 14 Aug 2018 13:56:52 +1000 [thread overview]
Message-ID: <153421901208.24426.12703365395600257400.stgit@noble> (raw)
In-Reply-To: <153421852728.24426.2111161640156686201.stgit@noble>
posix_locks_conflict() and flock_locks_conflict() both return int.
leases_conflict() returns bool.
This inconsistency will cause problems for the next patch if not
fixed.
So change posix_locks_conflict() and flock_locks_conflict() to return
bool.
Also change the locks_conflict() helper.
And convert some
return (foo);
to
return foo;
Signed-off-by: NeilBrown <neilb@suse.com>
---
fs/locks.c | 27 +++++++++++++++------------
1 file changed, 15 insertions(+), 12 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index 9439eebd4eb9..c7a372cebff1 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -803,47 +803,50 @@ locks_delete_lock_ctx(struct file_lock *fl, struct list_head *dispose)
/* Determine if lock sys_fl blocks lock caller_fl. Common functionality
* checks for shared/exclusive status of overlapping locks.
*/
-static int locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl)
+static bool locks_conflict(struct file_lock *caller_fl,
+ struct file_lock *sys_fl)
{
if (sys_fl->fl_type == F_WRLCK)
- return 1;
+ return true;
if (caller_fl->fl_type == F_WRLCK)
- return 1;
- return 0;
+ return true;
+ return false;
}
/* Determine if lock sys_fl blocks lock caller_fl. POSIX specific
* checking before calling the locks_conflict().
*/
-static int posix_locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl)
+static bool posix_locks_conflict(struct file_lock *caller_fl,
+ struct file_lock *sys_fl)
{
/* POSIX locks owned by the same process do not conflict with
* each other.
*/
if (posix_same_owner(caller_fl, sys_fl))
- return (0);
+ return false;
/* Check whether they overlap */
if (!locks_overlap(caller_fl, sys_fl))
- return 0;
+ return false;
- return (locks_conflict(caller_fl, sys_fl));
+ return locks_conflict(caller_fl, sys_fl);
}
/* Determine if lock sys_fl blocks lock caller_fl. FLOCK specific
* checking before calling the locks_conflict().
*/
-static int flock_locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl)
+static bool flock_locks_conflict(struct file_lock *caller_fl,
+ struct file_lock *sys_fl)
{
/* FLOCK locks referring to the same filp do not conflict with
* each other.
*/
if (caller_fl->fl_file == sys_fl->fl_file)
- return (0);
+ return false;
if ((caller_fl->fl_type & LOCK_MAND) || (sys_fl->fl_type & LOCK_MAND))
- return 0;
+ return false;
- return (locks_conflict(caller_fl, sys_fl));
+ return locks_conflict(caller_fl, sys_fl);
}
void
next prev parent reply other threads:[~2018-08-14 3:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-14 3:56 [PATCH 0/5 v2] locks: avoid thundering-herd wake-ups NeilBrown
2018-08-14 3:56 ` [PATCH 5/5] fs/locks: create a tree of dependent requests NeilBrown
2018-08-14 3:56 ` [PATCH 3/5] fs/locks: allow a lock request to block other requests NeilBrown
2018-08-14 3:56 ` [PATCH 2/5] fs/locks: split out __locks_wake_up_blocks() NeilBrown
2018-08-14 3:56 ` [PATCH 1/5] fs/locks: rename some lists and pointers NeilBrown
2018-08-14 3:56 ` NeilBrown [this message]
2018-08-14 18:41 ` [PATCH 0/5 v2] locks: avoid thundering-herd wake-ups J. Bruce Fields
2018-08-14 19:12 ` Jeff Layton
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